ECM/PCM Power Relay Sense Circuit High

Where it lives

For P0690, the relay sits on the circuit this code reports. The description of P0690 reports a fault at the relay.

Check these first

• A short to voltage in the sense circuit
• High resistance in the sense wire
• A failed power relay
• Corrosion at the sense connector
• Stray add on wiring on the circuit

What to do next

1. Read the sense circuit voltage
2. Check for a short to power
3. Test the power relay
4. Inspect the sense wiring for corrosion
5. Remove stray wiring and replace the relay
6. Clear the code and retest

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